When embittered ex-pop-star Lennart Cederström finds a baby left for dead in a plastic bag, he is uncertain what to do - until he hears her cry. It is a clear, haunting, perfectly pitched note, and Lennart decides she will be his project. A child raised in isolation: the vehicle for a pure, uncorrupted music.

But like any girl brought up in a basement, young Theres turns out to have a few idiosyncrasies.